Pitman-connection



(N0 Mddel.)

1 J. M. HUTGHINSON.

PITMAN CONNECTION.

No. 428,612. Patented May 27, 1890.

Witnesses;

S u m I UNITED STATES PATENT QFFICE,

JULIUS M. I-IUTOI-IINSON, OF KALAMAZOO, MICHIGAN.

PlTMAN-CONNECTION.

SPECIFICATION forming part of Letters Patent No. 428,612, dated May 27,1890.

Application filed January 31,1890. $erial No. 338,810. (No model.)

To all whom, it may concern:

Be it known that I, J ULIUs M. HUrcH1NsoN, a citizen of the UnitedStates, residing at Kalamazoo, in the county of Kalamazoo and State ofMichigan, have invented certain new and useful Improvements inPitman-Oonnections, of which the following is a specification, referencebeing had therein to the aecompa nying drawings.

This invention relates to new and useful improvements in pitmen andpitman-connections, especially designed to be applied to mowers,reaper-s, 850.; and the invention relates to the peculiar constructionof the pitman-rod and connecting-bars and of the joint between the two;and, further, in the peculiar construction of a clamp connecting the barwith the cutter-bar of the mower, and, further, in the peculiarconstruction, arrangement, and combination of the various parts, as morefully hereinafter described.

In the drawingswhich accompany this specification, Figure 1 is a planview of my improved device as applied to a mower. Fig.2 is a "erticalcentral longitudinal section thereof, partly in elevation. Fig. 3 is across-section on line 00 0c in Fig. 1. Fig. 4c is a crosssection on liney yin Fig. 3. Fig. 5 is a similar section to Fig. 3,sl1owing thespring-clamp expanded. Fig. 6 is a section on line ,2 z in Fig. 5. Fig.7 is an enlarged view of the spring connecting the two parts of thepitman. 7

A is the finger-bar of a harvester, in which slidingly engages thecutter-bar B, of known construction, as more fully hereinafterdescribed. Y

O is a box secured at the inner end of the finger-bar, in which theconnecting-bar D is slidingly journaled and adapted to be horizontallyreciprocated therein. The outer end of this bar is provided with ahorizontal slot, in which engages one end of the flat springE, whichforms the outer end portion of the pitman-rod, the other end of whichengages in a corresponding slot in the end of the pitman rod F. Thisspring I preferably make of the construction shown in Fig. 7, having theslots a at each end, through which the bolts 1) pass, and such portionsof the spring as are clamped between the two parts of the pitmanrod andconnecting-bar are roughened, as at for grinding, repairs, &c.

c, to enable them to be more firmly seatedin their positions. Inthe'lower jaw of the pitman-rod and connecting-bar I preferably form ascrew-threaded aperture, in which the bolt 1) engages; but, if desired,the bolt may pass entirely through these parts and the nut be placed atthe lower end thereof, as in the usual construction, to clamp the twoparts together upon the spring. It is evident that by this constructionI form a flexible connection between the pitman and connecting-barwithout the necessity of a joint, in which there is no lost motion orfriction, and there is no rattling or jarring during the rapidreciprocation of the pitman and cutter-bar.

The outer end of the bar D is recessed at G between the collars H toreceive the springclamp I, which has the rounded portion 0 and theclamping-jaws d, which engage the reduced portion 6 of the cutter-bar.

f is a spreader secured between the clampingjaws d of the spring-clampby means of the bolt 9, which passes through the barD and through therounded portion 0 of the clamp, and is provided at its upper end with asuitable wrench-hold for the handle h.

In normal position the spreader-bar f, as shown in Fig. 4, allows thejaws d to engage against the reduced portion 6 of the cutterbar, makinga tight connection between the bar D and the cutter-bar, whichconnection may be disconnected by turning the spreaderbarf, as shown inFig. 6, by means of the bolt 9 and handle h, spreading the clamp-jaws (lapart to allow of the withdrawal of the cutter-bar from between them,when it may be slid out through the open end of the finger hen thecutterbar is again in place, the clamp may be secured upon the reducedportion 6 by a reverse operation.

What I claim as my invention is 1. The combination of the reciprocatingconnecting-bar and the cutter-bar and a connection between the two,consisting of a detachable spring-clamp upon the connectingbar having aspreader therein and engaging with a shouldered bearing in thecutter-bar, substantially as described.

2. The combination, with the cutter-bar having a reduced portion, andthe reciprocating connecting-bar, of a spring-clamp on saidconnecting-bar detachably connected to the cutter-bar by fitting in thereduced portions thereof, substantially as described.

3. The combination, with the reciprocating connecting-bar and the cutterbar of a connection between the two,consisting ol'a spri ngclampembracing the connectingbar and having arms engaging a reduced portionof the cutter-bar, substantially as described.

4-. The combination of the reciprocating con heating-bar, a spring-clampon said bar engaged with the cutter-bar, and a spreader adapted todisconnect the clamp from the cutter-bar, substantially as described Thecombination, with the pitmanrod and the reciprocating horizontalconnectingbar, of a flat spring forming the outer end of the pitman andconnected to the connectingbar, substantially as described.

6. lhe combination of the pitmanrod and the c0nneeting-bar having slotstherein, a flat spring; havingbifurcated ends and the surface near theends milled, clamped Within said slots and forming-the connectionbetween the same, substantially as described.

T The combination of the pitman-rod F, the spring E, the connectingbarD, the box (1, the spring-clamp I, consisting of the tubular portion 1;and the arms (I, the cutter-bar having the reduced portion a, and thespreader-f, substantially as described.

8. The combination of the pitman-rod F, having a slot in the endthereof, the connecting-bar l), similarly slotted,the spring'E, havingthe slots (I and the corrugated portions 0, and the bolts 1), the partsbeing arranged to operate substantially as and for the purposedescribed. '7

In testimony whereof I atfix my signature, in presence of two Witnesses,this 15th day of January, 1390.

JULIIS M. IIUTCIIINSON.

Witnesses:

WM. (1%. llOXVARl), FRED L. UlL-HPELL.

